/* Copyright (c) 2008, The Visigoth Software Society
 * Copyright (c) 2006, Sun Microsystems Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notices,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name Visigoth Software Society, FreeCC, Sun Microsystems, Inc. 
 *       nor the names of any contributors may be used to endorse or promote 
 *       products derived from this software without specific prior written 
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.visigoths.freecc.lexgen;

import org.visigoths.freecc.parser.Token;

/**
 * Describes string literals.
 */

public class RStringLiteral extends RegularExpression {

  /**
   * The string image of the literal.
   */
  public String image;

  public RStringLiteral(Token t, String image) {
    super(t.grammar);
    this.beginLine = t.beginLine;
    this.beginColumn = t.beginColumn;
    this.image = image;
  }


  Nfa GenerateNfa(LexicalState lexState, boolean ignoreCase)
  {
     if (image.length() == 1)
     {
        RCharacterList temp = new RCharacterList(grammar, image.charAt(0));
        return temp.GenerateNfa(lexState, ignoreCase);
     }

     NfaState startState = new NfaState(lexState);
     NfaState theStartState = startState;
     NfaState finalState = null;

     if (image.length() == 0)
        return new Nfa(theStartState, theStartState);

     int i;

     for (i = 0; i < image.length(); i++)
     {
        finalState = new NfaState(lexState);
        startState.charMoves = new char[1];
        startState.addChar(image.charAt(i));

        if (grammar.getOptions().getIgnoreCase() || ignoreCase)
        {
           startState.addChar(Character.toLowerCase(image.charAt(i)));
           startState.addChar(Character.toUpperCase(image.charAt(i)));
        }

        startState.next = finalState;
        startState = finalState;
     }

     return new Nfa(theStartState, finalState);
  }

  public String toString() {
    return super.toString() + " - " + image;
  }
  
  public String getImage() {
    return image;
  }
}
